Solution:
Direct attach or attach should not be, with script + guide data definitely no problem.
Sql2005 steps to go to Sql2000
1. Generate a For 2000 version of the database script
Sql2005 's Manger Studio
--Open "Object Explorer" (no words pressed F8), connect to your instance
--right key to go to 2000 of the library
-Mission
--Generating scripts
--In the "Select Database" of the Script wizard, make sure that you select the library that you want to go to 2000
--"Scripting all objects in the selected database" is checked
--In the next "Choose script Options", locate the "Script for server version" entry, select SQL Server 2000
--other options set as needed
--Finally, save the script to a. SQL script file
2. Create the target database in 2000
In Query Analyzer (or 2005 of Manger Studio opens the script file), connect to SQL Server 2000 and execute the script generated above. To create a new database
3. Lead the data from 2005 to 2000
Manger Studio, 2005
--Open "Object Explorer" (no words pressed F8), connect to your instance
--right key to go to 2000 of the library
-Mission
--Export data
--In the "Select data source" step of the SQL Server Import and Export Wizard, determine which database to export is selected
--In the Select target step, connect to 2000 and select the library you created in step 2
--In Select source table and Source view, select all tables
--finally completed